package com.example.async.Thread;

/**
 * 同步方法解决实现Runnable接口的线程安全问题
 *
 * 关于同步方法的总结：
 * 1.同步方法仍然涉及到同步监视器，只是不需要我们显式的声明
 * 2.非静态的同步方法，同步监视器是：this
 *      静态的同步方法，监视器是：当前类本身
 */
public class WindowTest3 {
    public static void main(String[] args) {
        Window3 w = new Window3();

        Thread t1 = new Thread(w);
        Thread t2 = new Thread(w);
        Thread t3 = new Thread(w);

        t1.setName("窗口1");
        t2.setName("窗口2");
        t3.setName("窗口3");

        t1.start();
        t2.start();
        t3.start();

    }


}

class Window3 implements Runnable {
    private int ticket = 100;

    @Override
    public void run() {
        while (ticket>0) {
            sell();
        }
    }

    private synchronized void sell() {//同步监视器：this
        if (ticket > 0) {
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName() + ":卖票，票号为" + ticket);
            ticket--;
        }
    }
}